Diesel Repair & Services
Elite Diesel Service is a full-service diesel shop in Millville, NJ. We repair and maintain light-duty pickups (Powerstroke, Cummins, Duramax), medium-duty trucks, and commercial and fleet diesels. From check engine light and no-start diagnostics to DPF and SCR repair, fuel system and turbo work, transmission and brakes — we cover the systems that fail most often on modern diesels. We also offer diesel preventive maintenance and emissions-compliant performance upgrades. All work is backed by clear estimates and warranty where applicable.
Emissions & Aftertreatment Systems
Failures in the DPF, SCR, and EGR systems increase with mileage, idle time, and short trips. We provide emissions-compliant service only — no illegal modifications or deletes. We diagnose and repair so your truck runs clean and passes inspection.
Common symptoms: derate, check engine light, poor fuel economy, limp mode, regen failures.
- DPF: soot loading and regen failures, pressure and temperature sensors, DPF cleaning (on-truck or off-truck when we offer it)
- SCR / DEF: dosing injector (DEF injector), DEF tank heater failures, DEF level and quality sensors, NOx sensors (upstream and downstream)
- EGR: valve sticking, cooler leaks and clogging
- EGT sensors: pre- and post-turbo, DPF-related
Typical turnaround depends on parts availability; we’ll give you an estimate after diagnosis. Schedule a diagnostic for regen issues, derate, or emissions codes.
Brake System Repairs
Heavy wear on diesel trucks comes from vehicle weight and towing. We service hydraulic and air brake components so you stop safely.
Common symptoms: pulling to one side, grinding, ABS light, long pedal travel.
- Brake pads and rotors (front and rear)
- Calipers and caliper slides
- Brake hoses and hard lines
- Master cylinders
- ABS wheel speed sensors and control modules
- Parking brake assemblies
- Brake fluid flushes
Engine & Cylinder Head Repairs
Top-end and internal engine work is often related to high mileage or overheating. We handle gaskets, heads, valvetrain, and platform-specific issues like injector cups and glow plugs.
Common symptoms: coolant loss, misfires, white smoke, overheating.
- Cylinder head gasket replacement
- Cracked or warped cylinder heads
- Valve job (valves, seats, seals)
- Rocker arms, lifters, pushrods
- Camshaft wear
- Injector cup failures (platform-dependent)
- Glow plugs and grid heaters
Fuel System Repairs
Modern diesel fuel systems run at high pressure — when they fail, the cost can be significant. We diagnose and repair the full fuel system so you get an accurate cause and a clear estimate before any work.
Common symptoms: hard start, no-start, knocking, excessive smoke, loss of power.
- High-pressure fuel pump (HPFP) — replacement and diagnostics
- Injectors — leaking, stuck, over-fueling; injector seals and lines
- Fuel rail pressure sensors and regulators
- Lift pumps
- Fuel filters and housings
- Water-in-fuel sensors
- Fuel tank contamination cleanup
We’ll test fuel pressure and pinpoint the fault before recommending parts. Schedule a fuel system diagnostic.
Transmission & Drivetrain
Transmission and drivetrain issues are common on tuned, towing, or high-mileage trucks. We diagnose automatics and manuals, plus transfer cases, differentials, and driveline components.
Common symptoms: slipping, harsh shifts, shudder, delayed engagement.
- Automatic / manual transmissions: valve body, solenoid packs, torque converters, coolers and lines, clutch packs, TCM/mechatronics, rebuilds, fluid and filter services
- Drivetrain: transfer cases, differentials, u-joints, axle seals, CV shafts (lighter-duty platforms)
Turbocharger & Air Induction
Boost leaks and actuator issues are frequent on diesel trucks. We test and repair the turbo system so you get full power and no overboost or underboost codes.
Common symptoms: loss of power, overboost/underboost codes, excessive smoke.
- Turbocharger replacements
- VGT actuators and boost control solenoids
- Wastegate issues
- Intercooler leaks
- Charge air piping and boots
- Intake manifolds
- MAP and boost sensors
Cooling System
Cooling is critical for diesel longevity, especially when towing. We repair radiators, water pumps, thermostats, and related parts so your engine runs at the right temperature.
Common symptoms: overheating, coolant loss, heater not working.
- Radiators, water pumps, thermostats
- Coolant hoses and degas bottles
- Cooling fans and fan clutches
- Oil coolers and heater cores
Electrical & Starting System
Diesels demand reliable electrical systems for cold starts and charging. We troubleshoot no-start, slow crank, and intermittent faults so you’re not left stranded.
Common symptoms: no-start, slow crank, intermittent electrical faults.
- Batteries (including dual-battery systems)
- Alternators and starters
- Glow plug control modules and grid heater relays
- Wiring harness repairs
- Grounds and voltage drop issues
- ECM/PCM power faults
Suspension & Steering
Heavy-duty wear on ball joints, tie rods, and steering components is common on work trucks. We replace worn parts so your truck tracks straight and rides safely.
Common symptoms: wander, clunks, uneven tire wear.
- Ball joints, tie rods, drag links, track bars
- Shocks and struts
- Leaf springs and bushings
- Steering boxes
How We Diagnose — Common Categories
Customers come in with a mix of symptoms. We use professional scan tools and diesel-specific experience to get to the root cause. Here are the diagnostic categories we see most:
- Check engine light — codes, drivability, and underlying cause
- No-start — fuel, electrical, compression, and timing
- Hard start — glow plugs, fuel pressure, batteries
- Loss of power — turbo, fuel, aftertreatment, boost leaks
- Excessive smoke — white, blue, or black smoke diagnosis
- Regen and derate issues — DPF, SCR, DEF, sensors
- Towing overheating — cooling system, EGT, load
- Rough idle — injectors, compression, sensors
We charge a diagnostic fee; if you approve the repair with us, it’s typically applied toward the work. See our FAQ for details.
Preventive Maintenance
Regular diesel maintenance reduces costly repairs and downtime. We offer diesel-specific oil and filter service, fuel filters, coolant, transmission, and differential service, plus pre-purchase and fleet PM inspections.
- Diesel oil and filter service
- Fuel filter replacement
- Transmission service (fluid and filter)
- Differential service
- Coolant flush
- Brake fluid flush
- Pre-purchase inspections (diesel)
- Fleet PM inspections
Performance Repairs & Upgrades
We pair performance work with reliability. Tow, street, or work-truck — we focus on supporting mods first and delete-free, emissions-compliant options only.
- Lift pump upgrades
- Injector and turbo upgrades
- Intercooler and exhaust (compliant)
- Monitoring (EGT, boost, fuel pressure)
- Transmission support upgrades
- Cooling upgrades
Fleet Services
Scheduled maintenance programs, priority scheduling, clear communication (estimates and approvals by text or email), service history per vehicle, and DOT inspection prep when offered. Reduce downtime and keep maintenance predictable.